CN221447275U - Battery module and battery pack - Google Patents

Abstract

The utility model provides a battery module and a battery pack, and relates to the technical field of batteries. The battery module comprises a battery core group, a bracket group, a first heat exchange plate and a second heat exchange plate. The battery cell group comprises a plurality of battery cells stacked along the thickness direction. The bracket group comprises two bearing frames arranged on two sides of the battery cell group; one side of the bearing frame, which is close to the battery cell group, is provided with a groove. The first heat exchange plate is arranged in the groove and is attached to the battery cell group. The second heat exchange plate is arranged on the side face of the battery cell group along the thickness direction of the battery cell. The battery pack provided by the utility model adopts the battery module. The battery module and the battery pack can solve the technical problem of poor cooling effect of the battery pack in the prior art.

Description

Battery module and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery module and a battery pack.

Background

The market popularization of new energy automobiles, the requirements of users on the quick charge performance of the battery pack of the new energy automobiles are more and more strict, and the cooling performance of the battery pack is insufficient due to the fact that the heat generation amount of the battery is increased along with the improvement of the quick charge rate; second, more cooling designs also occupy more gold space within the battery pack.

In the prior art, the bottom or top of the battery pack module in the battery pack is cooled; the battery pack has fewer cooling surfaces and poor cooling performance.

Disclosure of utility model

The utility model aims to provide a battery module which can solve the technical problem that a battery pack in the prior art is poor in cooling effect.

The utility model also aims to provide a battery pack which can solve the technical problem that the cooling effect of the battery pack is poor in the prior art.

Embodiments of the utility model may be implemented as follows:

an embodiment of the present utility model provides a battery module including:

The battery cell group comprises a plurality of battery cells stacked along the thickness direction;

the bracket group comprises two bearing frames arranged on two sides of the battery cell group; a groove is formed in one side, close to the battery cell group, of the bearing frame;

the first heat exchange plate is arranged in the groove and is attached to the battery cell group;

The second heat exchange plate is arranged on the side face of the battery cell group along the thickness direction of the battery cell.

Optionally, the battery module further comprises a third heat exchange plate, and the third heat exchange plate is provided with the top of the battery cell group;

and/or, the battery module further comprises a fourth heat exchange plate, and the fourth heat exchange plate is arranged at the bottom of the battery cell group.

Optionally, the bearing frame is shared by two adjacent battery modules, and two opposite sides of the bearing frame are provided with grooves, and the two grooves are used for setting the first heat exchange plate.

Optionally, the bearing frame is in an i-shape or a T-shape.

Optionally, the thickness of the first heat exchange plate is smaller than or equal to the depth of the groove.

Optionally, the second heat exchange plate is clamped between two of the carriers.

Optionally, the second heat exchange plate is located between two of the first heat exchange plates.

Optionally, a gap is formed between the second heat exchange plate and the battery cell group, and a heat conduction pad is arranged in the gap.

Optionally, the bearing frame is hollowed out.

A battery pack comprises the battery module.

The battery module and the battery pack provided by the utility model have the beneficial effects compared with the prior art that:

In the battery module and the battery pack, the grooves are formed in the bearing frame, and then the first heat exchange plates are arranged in the grooves, so that heat exchange effect can be provided for the battery cell group through the first heat exchange plates in the grooves; meanwhile, a second heat exchange plate is arranged in the battery cell group along the thickness direction of the battery cell to provide heat exchange effect for the battery cell group, so that the heat exchange effect can be provided for the battery cell group from a plurality of sides, and the thermal management effect for the battery cell group is improved. Therefore, the battery module and the battery pack can solve the technical problem of poor cooling effect of the battery pack in the prior art.

Further, a third heat exchange plate and/or a fourth heat exchange plate can be further arranged to provide a heat exchange effect for the top and/or the bottom of the battery cell group, so that the heat exchange surface of the battery cell group is further increased, and the heat exchange effect on the battery cell group is improved. Further improve the poor technical problem of battery package cooling effect among the prior art.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a battery module according to an embodiment of the present application;

fig. 2 is a schematic view illustrating an explosion structure of a battery module according to an embodiment of the present application.

Icon: 10-a battery module; 100-cell groups; 110-cell; 111-a first side; 112-a second side; 113-top surface; 200-stent group; 210-a carrier; 211-grooves; 300-a first heat exchange plate; 400-second heat exchange plate.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.

It should be noted that the features of the embodiments of the present utility model may be combined with each other without conflict.

Referring to fig. 1, a battery module 10 is provided in an embodiment of the present application, and the battery module 10 may be used to store electric energy and transmit the electric energy to electric equipment when the battery module 10 is connected to the electric equipment. It should be noted that, generally, the battery module 10 is applied to a battery pack, and one or more battery modules 10 may form a battery pack, and the battery pack may be externally connected to an electric device to transmit electric energy to the electric device. The battery module 10 provided in this embodiment can solve the technical problem of poor cooling effect of the battery pack in the prior art.

In the present embodiment, referring to fig. 1 and 2 in combination, the battery module includes a battery cell group 100, a bracket group 200, a first heat exchange plate 300 and a second heat exchange plate 400. The battery cell group 100 includes a plurality of battery cells 110 stacked in the thickness direction. The bracket set 200 comprises two bearing frames 210 arranged at two sides of the battery cell set 100; the carrier 210 has a recess 211 on a side near the cell unit 100. The first heat exchange plate 300 is disposed in the groove 211 and is attached to the battery cell group 100. The second heat exchange plate 400 is disposed on a side surface of the cell group 100 along the thickness direction of the cell 110.

Wherein, the battery cell 110 has a first side 111 in the thickness direction, and when a plurality of battery cells 110 are stacked in the thickness direction thereof, two first sides 111 are exposed at both ends of the battery cell group 100 in the thickness direction of the battery cells 110; in addition, the top of the plurality of cells 110 forms the top surface 113 of the cell stack 100, and the bottom of the plurality of cells 110 forms the bottom surface of the cell stack 100; the cell stack 100 further has a second side 112 adjacent to the first side 111, the second side 112 being formed by the sides of the plurality of cells 110 adjacent to the top 113, the second side 112 also being adjacent to the top 113 and the bottom. In the present embodiment, the two carriers 210 are respectively disposed on the two second sides 112 of the battery cell group 100, so that the first heat exchange plate 300 contacts with the second sides 112 to provide a heat exchange effect to the second sides 112; the second heat exchange plate 400 is disposed on the first side 111 to provide heat exchange to the first side 111.

Based on this, compared with the prior art, the battery module 10 provided in the present embodiment provides the heat exchange effect on the second side 112, so that the heat exchange effect can be provided to the battery cell group 100 from multiple sides, and the thermal management effect on the battery cells 110 can be effectively improved. That is, by providing the recess 211 on the carrier 210 and then disposing the first heat exchange plate 300 inside the recess 211, a heat exchange effect can be provided to the cell stack 100 through the first heat exchange plate 300 inside the recess 211; meanwhile, the second heat exchange plate 400 is further arranged in the cell group 100 along the thickness direction of the cell 110 to provide a heat exchange effect for the cell group 100, so that the heat exchange effect can be provided for the cell group 100 from a plurality of sides, and the thermal management effect for the cell group 100 is improved. Therefore, the battery module 10 can solve the technical problem of poor cooling effect of the battery pack in the prior art.

Optionally, the battery module 10 further includes a third heat exchange plate (not shown), where the third heat exchange plate is provided on top of the battery cell group 100; that is, the third heat exchange plate is also provided on the top surface 113 of the cell stack 100 for heat management. And/or, the battery module 10 further includes a fourth heat exchange plate (not shown), which is disposed at the bottom of the battery cell group 100; that is, a fourth heat exchange plate is also provided on the bottom surface of the cell stack 100 for heat management.

Wherein, "and/or" means that the third heat exchange plate may be provided only at the top surface 113 of the cell stack 100 to provide a thermal management effect to the top surface 113 of the cell stack 100; or the fourth heat exchange plate can be arranged on the bottom surface of the battery cell group 100 only to provide a thermal management function for the bottom surface of the battery cell group 100; alternatively, a third heat exchange plate may be disposed on the top surface 113 of the cell stack 100, and a fourth heat exchange plate may be disposed on the bottom surface of the cell stack 100 to provide thermal management to both the top surface 113 and the bottom surface of the cell stack 100.

Under the condition that the third heat exchange plate and the fourth heat exchange plate are arranged, the number of the sides of the battery cell group 100 for heat management can be further increased, so that the heat management effect on the battery cell group 100 is improved, and the technical problem that the cooling effect of the battery pack is poor in the prior art is further improved.

In the present embodiment, the carrier 210 is shared by two adjacent battery modules 10, and the opposite sides of the carrier 210 are provided with grooves 211. That is, one carrier 210 may be shared by two battery modules 10, two grooves 211 on the carrier 210 each accommodate a first heat exchange plate 300, and the first heat exchange plate 300 in one groove 211 and the first heat exchange plate 300 in the other groove 211 correspond to two battery cell groups 100, respectively, to provide heat exchange effect to the two battery cell groups 100. By adopting the mode, the space inside the battery pack shell is fully utilized, the space is reasonably utilized, and the energy density of the battery pack is improved.

It should be noted that, in the case that the battery pack 100 is not disposed on one side of the carrier 210, the recess 211 on the side where the battery pack 100 is not disposed may be omitted.

Alternatively, the carrier 210 is I-shaped or T-shaped. It should be noted that, when the cross section of the carrier 210 is in an i-shape or a T-shape, the opposite sides of the carrier 210 are provided with grooves 211, that is, the opposite sides of the carrier 210 are provided with the battery cell groups 100.

Of course, in the case where the cell stack 100 is not disposed at one side of the carrier 210, the cross section of the carrier 210 may also be in a C-shape or an L-shape.

In some implementations of the present embodiment, if the cross section of the carrier 210 is in an i shape, and the carrier 210 disposed at the edge is configured in a C shape. Alternatively, the thickness of the first heat exchange plate 300 is less than or equal to the depth of the groove 211, such that the first heat exchange plate 300 is completely accommodated inside the groove 211; of course, it may also be considered that the first heat exchange plate 300 does not protrude out of the groove 211 in case the first heat exchange plate 300 is disposed inside the groove 211. Based on this, in the process of assembling the battery module 10, the first heat exchange plate 300 may be integrated onto the carrier 210 first, and in the case where the carrier 210 is assembled into the case of the battery pack, the assembly of the battery cell pack 100 may be performed again. At this time, since the first heat exchange plate 300 does not protrude out of the recess 211, the installation and assembly of the battery cell pack 100 are facilitated.

It should be noted that, in general, the carrier 210 is disposed in contact with a side surface of the battery cell group 100, so as to provide a supporting function for the battery cell group 100, improve the assembly stability of the battery cell group 100, and achieve the purpose of reasonably utilizing space. Based on this, in the case that the thickness of the first heat exchange plate 300 is smaller than the depth of the groove 211, in order to ensure that the first heat exchange plate 300 provides an efficient heat exchange effect for the cell stack 100, the first heat exchange plate 300 is attached to the side surface of the cell stack 100, so that heat transfer between the first heat exchange plate 300 and the cell stack 100 is facilitated, and thus the purpose of improving heat exchange efficiency is achieved; further, in this case, a side of the first heat exchange plate 300 remote from the cell group 100 is spaced from the bottom wall of the recess 211.

It should be appreciated that in other embodiments of the present application, if the thickness of the first heat exchange plate 300 is smaller than the depth of the groove 211, the first heat exchange plate 300 may be spaced apart from the cell stack 100. Alternatively, in the case where the first heat exchange plate 300 is spaced apart from the cell stack 100, the heat exchange efficiency may be improved by providing a heat conductive material between the cell stack 100 and the first heat exchange plate 300.

Of course, when the thickness of the first heat exchange plate 300 is equal to the depth of the groove 211, the cell set 100 is attached to the carrier 210, so as to be attached to the first heat exchange plate 300, thereby achieving the purpose of improving the heat exchange efficiency.

In addition, in other embodiments of the present application, the thickness of the first heat exchange plate 300 may be set to be greater than the depth of the recess 211, and at this time, after the assembly of the battery module 10 is completed, the battery cell pack 100 is attached to the first heat exchange plate 300 while forming a space with the carrier 210.

In other implementations of the present embodiment, if the cross section of the carrier 210 is T-shaped, and the carrier 210 disposed at the edge is L-shaped. No particular limitation is required to be set with respect to the thickness of the first heat exchange plate 300. In addition, during the process of assembling the battery module 10, the integrated arrangement of the first heat exchange plate 300 and the carrier 210 may be preferentially completed, and then, in the case that the carrier 210 and the first heat exchange plate 300 are assembled into the battery pack case, the assembly of the battery cell group 100 and the carrier 210 is completed; alternatively, the integrated assembly of the first heat exchange plate 300 and the battery cell pack 100 may be preferentially completed, and then the whole of the battery cell pack 100 and the first heat exchange plate 300 may be assembled to the carrier 210 after the carrier 210 and the case of the battery pack are assembled.

In addition, in the present embodiment, the second heat exchange plate 400 is sandwiched between the two carriers 210. In order to improve the overall stability of the second heat exchange plate 400, the second heat exchange plate 400 is clamped between the two bearing frames 210, and the second heat exchange plate 400 is restrained by the two bearing frames 210, so that the assembly stability of the second heat exchange plate 400 can be ensured.

Further, the second heat exchanger plate 400 is located between two first heat exchanger plates 300. Based on this, it is convenient for the first heat exchange plate 300 to continue to extend in the length direction thereof, and the portion of the first heat exchange plate 300 that passes over the second heat exchange plate 400 may be applied to another battery module 10. In other words, in the thickness direction of the battery cells 110, a plurality of battery cell groups 100 may be arranged, and the plurality of battery cell groups 100 may share two first heat exchange plates 300; of course, two carriers 210 may also be shared by multiple cell stacks 100.

In this embodiment, a gap (not shown) is formed between the second heat exchange plate 400 and the battery cell group 100, and a heat conducting pad (not shown) is disposed in the gap. By arranging the heat conducting pad in the gap, heat can be quickly transferred through the heat conducting pad, so that the transfer efficiency of heat between the battery cell group 100 and the second heat exchange plate 400 can be improved, and the heat management efficiency can be improved. For example, in case that the battery cell pack 100 generates heat, the heat can be rapidly transferred to the second heat exchange plate 400 through the heat conductive pad to be rapidly cooled by the second heat exchange plate 400, thereby improving the cooling effect.

It should be understood that in other embodiments of the present application, the gap and thermal pad arrangement may be eliminated; that is, the second heat exchange plate 400 may be directly attached to the first side 111 of the battery cell pack 100.

In this embodiment, the carrier 210 is hollowed out. The bearing frame 210 is provided with a hollow structure, so that on one hand, the overall quality of the bearing frame 210 can be reduced, and the overall quality of the battery module 10 can be reduced; on the other hand, the heat insulation effect can be provided by the carrier 210 conveniently, so that the heat transfer between the two battery cell groups 100 on two opposite sides of the carrier 210 is prevented, and the heat diffusion condition can be relieved and the safety of the battery module 10 is improved under the condition that one battery cell group 100 is out of control.

Based on the above-provided battery module 10, a battery pack (not shown) is also provided in the embodiment of the application, and the battery pack adopts the above-described battery module 10. Therefore, the battery pack can solve the technical problem of poor cooling effect of the battery pack in the prior art.

In summary, in the battery module 10 and the battery pack, the grooves 211 are formed on the carrier 210, and then the first heat exchange plates 300 are disposed inside the grooves 211, so that the heat exchange effect can be provided to the battery cell group 100 through the first heat exchange plates 300 in the grooves 211; meanwhile, the second heat exchange plate 400 is further arranged in the cell group 100 along the thickness direction of the cell 110 to provide a heat exchange effect for the cell group 100, so that the heat exchange effect can be provided for the cell group 100 from a plurality of sides, and the thermal management effect for the cell group 100 is improved. Therefore, the battery module 10 and the battery pack can solve the technical problem of poor cooling effect of the battery pack in the prior art. Further, a third heat exchange plate and/or a fourth heat exchange plate may be further provided to provide a heat exchange effect to the top and/or bottom of the battery cell group 100, further increase the heat exchange surface of the battery cell group 100, and improve the heat exchange effect on the battery cell group 100. Further improve the poor technical problem of battery package cooling effect among the prior art.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (10)

1. A battery module, comprising:

A cell group (100) including a plurality of cells (110) stacked in a thickness direction;

The bracket group (200) comprises two bearing frames (210) arranged at two sides of the battery cell group (100); a groove (211) is formed in one side, close to the battery cell group (100), of the bearing frame (210);

The first heat exchange plate (300) is arranged in the groove (211) and is attached to the battery cell group (100);

and the second heat exchange plate (400) is arranged on the side surface of the battery cell group (100) along the thickness direction of the battery cells (110).

2. The battery module according to claim 1, characterized in that the battery module (10) further comprises a third heat exchange plate provided with the top of the cell stack (100);

And/or, the battery module (10) further comprises a fourth heat exchange plate, and the fourth heat exchange plate is arranged at the bottom of the battery cell group (100).

3. The battery module according to claim 1, wherein the carrier (210) is shared by two adjacent battery modules (10), and the grooves (211) are formed in opposite sides of the carrier (210), and the grooves (211) are used for arranging the first heat exchange plates (300).

4. A battery module according to claim 3, wherein the carrier (210) is i-shaped or T-shaped.

5. The battery module according to claim 1, wherein the thickness of the first heat exchange plate (300) is less than or equal to the depth of the groove (211).

6. The battery module according to claim 1, wherein the second heat exchange plate (400) is sandwiched between the two carriers (210).

7. The battery module according to claim 6, wherein the second heat exchange plate (400) is located between two of the first heat exchange plates (300).

8. The battery module according to claim 1, wherein a gap is formed between the second heat exchange plate (400) and the cell group (100), and a heat conductive pad is disposed in the gap.

9. The battery module according to claim 1, wherein the carrier (210) is hollowed out.

10. A battery pack comprising a battery module (10) according to any one of claims 1-9.